Testosterone therapy, not PDE5 inhibitors, is more commonly studied for low libido in surgically menopausal women.
This highlights desire versus arousal as different targets for medication.
Hormone replacement therapy is a complex consideration on its own.

Instead, many women like Nicole have been conducting experiments of their own. “I know it’s not for every woman,” she says, “but I think more women should give it a try.” However, it’s not hard to find women who decide it’s not for them, after giving it a try. This was certainly the case for Vanessa, who is also using a fake name for privacy reasons.

How Sesame can help

“My partner and I have been experimenting with aphrodisiacs for years,” she says.

Cialis and Viagra are both used to treat sexual dysfunction, but their effects differ between men and women.
Some women use off-label prescriptions of Viagra to enhance arousal and improve sexual satisfaction.
Cialis for women is less common and is primarily intended for erectile issues in men; its effectiveness for women is not well-established.
Viagra may increase blood flow, potentially improving female sexual arousal and desire in some women.
Women should consult healthcare providers before using Cialis or Viagra, due to possible side effects and interactions.
Research on Cialis for women shows limited evidence; more studies are needed to confirm benefits and safety.
Viagra has been studied more extensively for women, but results are mixed regarding its effectiveness.
Both drugs can cause side effects such as headaches, flushing, or nasal congestion, which women should consider.
Female-specific sexual dysfunction may involve hormonal or psychological factors, not just blood flow issues.
Off-label use of these medications for women should be approached cautiously and under medical supervision.
Dosage and response to Cialis or Viagra can vary significantly among women; personalized medical advice is essential.
Non-pharmacological interventions, like therapy and lifestyle changes, are also recommended for female sexual dysfunction.

When he got a prescription for Viagra, Vanessa wanted to try it. “It gave me a mild increase in sensitivity, but did not seem to result in harder or more frequent orgasms,” she says. She also experienced an annoying side effect: headaches. “I get headaches pretty easily, so the risk of getting a headache each time made Viagra seriously not worth it for me,” she says. Yet, Vanessa also thinks that her experience with other aphrodisiacs may have had something to do with her rejection of Viagra, despite being what drew her to it in the first place. “I’ve played with some really effective aphrodisiacs, so the mild benefit of Viagra was totally unremarkable,” she says. It’s experimentation of this kind that medical experts are wary of. Dr Lawrence Cunningham, the medical and health contributing editor at UK Care Guide, certainly advises caution. “It’s important to remember that Viagra was initially developed to treat high blood pressure and angina,” he says. “It worked by relaxing blood yellow viagra pill vessels, allowing for increased blood flow. However, what was found was that, in men, it increased blood flow to the penis, which initially aided in the treatment of erectile dysfunction. Now, it is obviously used recreationally,” he admits, but stresses that its effects on women are less clear. “In my experience, some women have reported increased blood flow to the genital area, potentially increasing arousal or sexual pleasure,” says Cunningham. “However, the evidence is less robust than in men. A number of clinical trials have demonstrated mixed results, with some women experiencing benefits and others reporting little to no change.” Others experience a range of side effects, from flushing, dizziness and headaches, to an upset stomach, blue-tinged vision, and – perhaps most worryingly – adverse reactions when combined with other medications. “If a woman is looking at trying Viagra, I always recommend that they consult with their healthcare provider beforehand,” he says finally. “It’s crucial to discuss the potential benefits, risks, and alternatives.” On this evidence, it would seem Viagra is a bit hit and miss for women – mind-blowing orgasms for some, mind-blowing migraines for others. Yet, there is one portion of the population who take Viagra regularly, but rarely get a look in on discussions about the drug, and its effectiveness. And that’s mainly for one deceptively simple reason: their use of the drug isn’t sexy at all. Louise, whose name has also been changed for privacy reasons, is in her late twenties, and has been taking tadalafil – a Viagra equivalent – since she was 16. She was put on the drug by specialist doctors, after being diagnosed with idiopathic pulmonary arterial hypertension (IPAH). “The simplified version is that my condition causes blood vessels in the lungs to be quite brittle,” she explains. “Tadalafil and other vasodilators widen those blood vessels, which reduces the high pressure in my lungs.” At first Louise was put on a full dosage and immediately experienced side effects – “dizziness, nausea and uncontrollable hiccups” – but her dose was reduced and she eventually acclimatised.

Product	Dosage	Quantity + Bonus	Price
Viagra Super Active	100mg	20 + 4 Pills	48.05€ 45.76€
Viagra Generic	200mg	60 + 4 Pills	125.19€ 119.23€
Viagra Super Active	100mg	60 + 8 Pills	116.84€ 111.28€
Viagra Oral Jelly	100mg	110 + 9 Sachets	284.63€ 271.08€
Viagra Soft Tabs	100mg	20 Pills	62.99€ 59.99€
Viagra Super Active	100mg	360 + 30 Pills	470.93€ 448.50€
Viagra Professional	100mg	20 Pills	71.14€ 67.75€
Viagra Super Active	100mg	90 + 10 Pills	165.61€ 157.72€
Viagra Generic	25mg	360 + 10 Pills	213.68€ 203.50€
Viagra Generic	150mg	90 + 6 Pills	147.18€ 140.17€
Viagra Generic	200mg	90 + 6 Pills	170.79€ 162.66€
Viagra Original	100mg	34 + 2 Pills	163.67€ 155.88€
Viagra Professional	100mg	120 + 4 Pills	262.83€ 250.31€
Viagra Soft Tabs	100mg	180 + 10 Pills	314.95€ 299.95€
Viagra Generic	25mg	20 Pills	37.74€ 35.94€
Viagra Generic	50mg	120 + 6 Pills	129.64€ 123.47€
Viagra Original	100mg	76 + 4 Pills	306.59€ 291.99€

What she was yet to acclimatise to was people’s responses to her taking an erectile dysfunction drug.

Can Women Take Cialis?

“It worked by relaxing blood yellow viagra pill vessels, allowing for increased blood flow. However, what was found was that, in men, it increased blood flow to the penis, which initially aided in the treatment of erectile dysfunction. Now, it is obviously used recreationally,” he admits, but stresses that its effects on women are less clear. “In my experience, some women have reported increased blood flow to the genital area, potentially increasing arousal or sexual pleasure,” says Cunningham. “However, the evidence is less robust than in men.

GLP-1 Medications

A number of clinical trials have demonstrated mixed results, with some women experiencing benefits and others reporting little to no change.” Others experience a range of side effects, from flushing, dizziness and headaches, to an upset stomach, blue-tinged vision, and – perhaps most worryingly – adverse reactions when combined with other medications. “If a woman is looking at trying Viagra, I always recommend that they consult with their healthcare provider beforehand,” he says finally. “It’s crucial to discuss the potential benefits, risks, and alternatives.” On this evidence, it would seem Viagra is a bit hit and miss for women – mind-blowing orgasms for some, mind-blowing migraines for others. Yet, there is one portion of the population who take Viagra regularly, but rarely get a look in on discussions about the drug, and its effectiveness. And that’s mainly for one deceptively simple reason: their use of the drug isn’t sexy at all.

Report Problems to the Food and Drug Administration

Louise, whose name has also been changed for privacy reasons, is in her late twenties, and has been taking tadalafil – a Viagra equivalent – since she was 16. She was put on the drug by specialist doctors, after being diagnosed with idiopathic pulmonary arterial hypertension (IPAH). “The simplified version is that my condition causes blood vessels in the lungs to be quite brittle,” she explains. “Tadalafil and other vasodilators widen those blood vessels, which reduces the high pressure in my lungs.” At first Louise was put on a full dosage and immediately experienced side effects – “dizziness, nausea and uncontrollable hiccups” – but her dose was reduced and she eventually acclimatised. What she was yet to acclimatise to was people’s responses to her taking an erectile dysfunction drug. Although no one has ever assumed she takes the drug recreationally, she says people’s initial responses are still “almost universally funny”. Yet, while Louise now sees her condition as “one of those ‘if you viagra click and collect don’t laugh, you’ll cry’ situations”, she is also clearly frustrated with the lack of public knowledge. While pervasive cultural narratives about Viagra are surely partly to blame, Louise thinks some culpability also lies with pharmaceutical companies, and the medical establishment more broadly, for not prioritising or even acknowledging that Viagra and equivalent drugs might be useful for more than male pleasure. In 2013, a team of scientists in the US conducted a promising study into the effective treatment of menstrual pain with Viagra, but it failed to viagra vardenafil 20mg secure further funding and was twice rejected by the National Institutes of Health for additional grants. “I just feel they’re out of touch with women’s health,” Dr Richard Legro, Professor of Obstetrics & Gynecology at Penn State University, told StatNews. Louise says her tadalafil prescription leaflet doesn’t even allude to the drug’s alternative uses.

Study Phase	Cialis Research in Women	Viagra Research in Women	Primary Focus
Phase 1	Limited	Limited	Safety and dosing
Phase 2	Emerging	Emerging	Efficacy for sexual arousal
Phase 3	Not widely conducted	Not widely conducted	Large-scale efficacy and safety studies

This inevitably leads women – like those with conditions like Louise’s, as well as those experimenting with Viagra for sexual pleasure – to conduct their own unlicensed and private experiments.

Speak With Your Doctor

Common side effects of Cialis include headaches, indigestion, back pain, and muscle aches, which typically resolve within a few days. It is important to use Cialis with caution, especially for individuals with cardiovascular conditions, and to avoid combining it with nitrates or certain other medications due to the risk of serious interactions. Viagra® (sildenafil citrate), a phosphodiesterase type 5 (PDE5) inhibitor, is an oral medication used to treat erectile dysfunction (ED). It is taken only as needed, usually about an hour before sexual activity, though it can be effective if taken between 30 minutes to 4 hours prior. It is very important not to take Viagra more than once a day, as exceeding this frequency increases the risk of serious side effects, including vision loss and significant drops in blood pressure.

Cialis vs. Viagra quick comparison

The signs and symptoms of benign prostatic hyperplasia (BPH) The signs and symptoms of benign prostatic hyperplasia (BPH) ED and the signs and symptoms of BPH (ED/BPH) ED and the signs and symptoms of BPH (ED/BPH) Viagra (sildenafil citrate) is indicated to treat: Typically taken orally as needed prior to sexual activity, up to once daily (5 mg, 10 mg, and 20 mg doses) OR taken orally once daily (2.5 mg and 5 mg doses) Typically taken orally as needed prior to sexual activity, up to once daily (5 mg, 10 mg, and 20 mg doses) OR taken orally once daily (2.5 mg and 5 mg doses) Comes in 2.5 mg, 5 mg, 10 mg, and 20 mg tablets Comes in 2.5 mg, 5 mg, 10 mg, and 20 mg tablets Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Comes in 25 mg, 50 mg, and 100 mg tablets Comes in 25 mg, 50 mg, and 100 mg tablets Administration of Cialis to patients using any form of organic nitrate is contraindicated Administration of Cialis to patients using any form of organic nitrate is contraindicated History of known serious hypersensitivity reaction to Cialis or Adcirca History of known serious hypersensitivity reaction to Cialis or Adcirca Drug interactions: Nitrates, alpha blockers, antihypertensives, alcohol, CYP3A4 inhibitors (e.g., ketoconazole, ritonavir), CYP3A4 inducers (e.g., rifampin) Drug interactions: Nitrates, alpha blockers, antihypertensives, alcohol, CYP3A4 inhibitors (e.g., ketoconazole, ritonavir), CYP3A4 inducers (e.g., rifampin) Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Known hypersensitivity to sildenafil or any component of tablet Known hypersensitivity to sildenafil or any component of tablet Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Patients should not use Cialis if sex is inadvisable due to cardiovascular status Patients should not use Cialis if sex is inadvisable due to cardiovascular status Use of Cialis with alpha blockers, antihypertensives or substantial amounts of alcohol (≥5 units) may lead to low blood pressure Use of Cialis with alpha blockers, antihypertensives or substantial amounts of alcohol (≥5 units) may lead to low blood pressure Cialis is not recommended in combination with alpha blockers for the treatment of BPH, because efficacy of the combination has not been adequately studied and because of the risk of blood pressure lowering Cialis is not recommended in combination with alpha blockers for the treatment of BPH, because efficacy of the combination has not been adequately studied and because of the risk of blood pressure lowering If taking potent inhibitors of CYP3A4, dose should be adjusted If taking potent inhibitors of CYP3A4, dose should be adjusted Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Cialis and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic ischemic optic neuropathy (NAION) Patients should stop Cialis and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic ischemic optic neuropathy (NAION) Patients should stop Cialis and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Cialis and seek prompt medical attention in the event of sudden decrease or loss of hearing Prior to initiating treatment with Cialis for BPH, consideration should be given to other urological conditions that may cause similar symptoms Prior to initiating treatment with Cialis for BPH, consideration should be given to other urological conditions that may cause similar symptoms Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures *This information is from the label for brand name Cialis®. “I think it’s part of a wider conversation about how the life of a drug works,” she says. “Lots of things begin as one thing, then are found to be useful for another.” In a nutshell, this has always been the story of Viagra: the heart medication that just happened to give guys boners. Perhaps now, it’s time to stop thinking of that as its sole purpose.

How Both Medications Work

Compare common side effects, interactions, warnings, and more. Cialis® (tadalafil) is used to treat erectile dysfunction (ED) and the symptoms of benign prostatic hyperplasia (BPH).

What Happens When a Woman Takes Viagra?

Although no one has ever assumed she takes the drug recreationally, she says people’s initial responses are still “almost universally funny”. Yet, while Louise now sees her condition as “one of those ‘if you viagra click and collect don’t laugh, you’ll cry’ situations”, she is also clearly frustrated with the lack of public knowledge. While pervasive cultural narratives about Viagra are surely partly to blame, Louise thinks some culpability also lies with pharmaceutical companies, and the medical establishment more broadly, for not prioritising or even acknowledging that Viagra and equivalent drugs might be useful for more than male pleasure. In 2013, a team of scientists in the US conducted a promising study into the effective treatment of menstrual pain with Viagra, but it failed to viagra vardenafil 20mg secure further funding and was twice rejected by the National Institutes of Health for additional grants. “I just feel they’re out of touch with women’s health,” Dr Richard Legro, Professor of Obstetrics & Gynecology at Penn State University, told StatNews.

Addyi (Flibanserin)

Louise says her tadalafil prescription leaflet doesn’t even allude to the drug’s alternative uses. This inevitably leads women – like those with conditions like Louise’s, as well as those experimenting with Viagra for sexual pleasure – to conduct their own unlicensed and private experiments. “I think it’s part of a wider conversation about how the life of a drug works,” she says. “Lots of things begin as one thing, then are found to be useful for another.” In a nutshell, this has always been the story of Viagra: the heart medication that just happened to give guys boners. Perhaps now, it’s time to stop thinking of that as its sole purpose.

Cons of Viagra

Compare common side effects, interactions, warnings, and more. Cialis® (tadalafil) is used to treat erectile dysfunction (ED) and the symptoms of benign prostatic hyperplasia (BPH). It works by relaxing the muscles of blood vessels and increasing blood flow to particular areas of the body, notably the penis. Cialis is known for its long-lasting effects, allowing for more spontaneity, as it can remain effective for up to 36 hours. It is typically taken as needed, but a lower daily dose option is also available for continuous treatment. It works by relaxing the muscles of blood vessels and increasing blood flow to particular areas of the body, notably the penis.

What If Viagra or Cialis Is Not Enough?

“Immediately after Viagra’s ‘blockbuster’ debut, many wondered if the little blue pill would work for women,” Meika Loe wrote in her 2000 book, The Rise of Viagra. But the quest for an officially licensed little pink pill has, so far, remained elusive. Instead, many women like Nicole have been conducting experiments of their own. “I know it’s not for every woman,” she says, “but I think more women should give it a try.” However, it’s not hard to find women who decide it’s not for them, after giving it a try. This was certainly the case for Vanessa, who is also using a fake name for privacy reasons.

What is the dosage of Cialis vs. Viagra?

“My partner and I have been experimenting with aphrodisiacs for years,” she says. When he got a prescription for Viagra, Vanessa wanted to try it. “It gave me a mild increase in sensitivity, but did not seem to result in harder or more frequent orgasms,” she says. She also experienced an annoying side effect: headaches. “I get headaches pretty easily, so the risk of getting a headache each time made Viagra seriously not worth it for me,” she says.

Top Cialis vs Viagra Related Articles

Yet, Vanessa also thinks that her experience with other aphrodisiacs may have had something to do with her rejection of Viagra, despite being what drew her to it in the first place. “I’ve played with some really effective aphrodisiacs, so the mild benefit of Viagra was totally unremarkable,” she says. It’s experimentation of this kind that medical experts are wary of. Dr Lawrence Cunningham, the medical and health contributing editor at UK Care Guide, certainly advises caution. “It’s important to remember that Viagra was initially developed to treat high blood pressure and angina,” he says. Cialis is known for its long-lasting effects, allowing for more spontaneity, as it can remain effective for up to 36 hours. It is typically taken as needed, but a lower daily dose option is also available for continuous treatment. Common side effects of Cialis include headaches, indigestion, back pain, and muscle aches, which typically resolve within a few days. It is important to use Cialis with caution, especially for individuals with cardiovascular conditions, and to avoid combining it with nitrates or certain other medications due to the risk of serious interactions. Viagra® (sildenafil citrate), a phosphodiesterase type 5 (PDE5) inhibitor, is an oral medication used to treat erectile dysfunction (ED). It is taken only as needed, usually about an hour before sexual activity, though it can be effective if taken between 30 minutes to 4 hours prior.

Viagra has been studied for its potential in treating female sexual arousal disorder with mixed outcomes.
Cialis might improve blood flow to genital tissues, but its use for women remains experimental.
These medications should not be used in women who are pregnant or breastfeeding without a doctor's approval.
The placebo effect can play a role in perceived improvements in sexual function with these drugs.
Psychological counseling and therapy can complement medication for comprehensive treatment of female sexual issues.
Women with heart problems or on certain medications should avoid Viagra or Cialis due to health risks.
Daily low-dose formulations are being explored as possible options for female sexual dysfunction.
The presence of underlying hormonal imbalances could influence how women respond to these drugs.
Most clinical trials focus on men; evidence for women is limited, requiring cautious application.
Both Viagra and Cialis may cause side effects like dizziness, flushing, and visual disturbances in women.
Proper diagnosis of female sexual dysfunction is vital before considering off-label use of these medications.
Patients should seek medical advice to evaluate whether these drugs are appropriate for their specific situation.

It is very important not to take Viagra more than once a day, as exceeding this frequency increases the risk of serious side effects, including vision loss and significant drops in blood pressure. The signs and symptoms of benign prostatic hyperplasia (BPH) The signs and symptoms of benign prostatic hyperplasia (BPH) ED and the signs and symptoms of BPH (ED/BPH) ED and the signs and symptoms of BPH (ED/BPH) Viagra (sildenafil citrate) is indicated to treat: Typically taken orally as needed prior to sexual activity, up to once daily (5 mg, 10 mg, and 20 mg doses) OR taken orally once daily (2.5 mg and 5 mg doses) Typically taken orally as needed prior to sexual activity, up to once daily (5 mg, 10 mg, and 20 mg doses) OR taken orally once daily (2.5 mg and 5 mg doses) Comes in 2.5 mg, 5 mg, 10 mg, and 20 mg tablets Comes in 2.5 mg, 5 mg, 10 mg, and 20 mg tablets Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Typically taken orally as needed approximately 60 minutes before sexual activity, up to once daily Comes in 25 mg, 50 mg, and 100 mg tablets Comes in 25 mg, 50 mg, and 100 mg tablets Administration of Cialis to patients using any form of organic nitrate is contraindicated Administration of Cialis to patients using any form of organic nitrate is contraindicated History of known serious hypersensitivity reaction to Cialis or Adcirca History of known serious hypersensitivity reaction to Cialis or Adcirca Drug interactions: Nitrates, alpha blockers, antihypertensives, alcohol, CYP3A4 inhibitors (e.g., ketoconazole, ritonavir), CYP3A4 inducers (e.g., rifampin) Drug interactions: Nitrates, alpha blockers, antihypertensives, alcohol, CYP3A4 inhibitors (e.g., ketoconazole, ritonavir), CYP3A4 inducers (e.g., rifampin) Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Administration of Viagra to patients using nitric oxide donors, such as organic nitrates or organic nitrites in any form Known hypersensitivity to sildenafil or any component of tablet Known hypersensitivity to sildenafil or any component of tablet Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Drug interactions: Nitrates, alpha blockers, antihypertensives, CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, saquinavir, erythromycin) Patients should not use Cialis if sex is inadvisable due to cardiovascular status Patients should not use Cialis if sex is inadvisable due to cardiovascular status Use of Cialis with alpha blockers, antihypertensives or substantial amounts of alcohol (≥5 units) may lead to low blood pressure Use of Cialis with alpha blockers, antihypertensives or substantial amounts of alcohol (≥5 units) may lead to low blood pressure Cialis is not recommended in combination with alpha blockers for the treatment of BPH, because efficacy of the combination has not been adequately studied and because of the risk of blood pressure lowering Cialis is not recommended in combination with alpha blockers for the treatment of BPH, because efficacy of the combination has not been adequately studied and because of the risk of blood pressure lowering If taking potent inhibitors of CYP3A4, dose should be adjusted If taking potent inhibitors of CYP3A4, dose should be adjusted Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Cialis and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic ischemic optic neuropathy (NAION) Patients should stop Cialis and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic ischemic optic neuropathy (NAION) Patients should stop Cialis and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Cialis and seek prompt medical attention in the event of sudden decrease or loss of hearing Prior to initiating treatment with Cialis for BPH, consideration should be given to other urological conditions that may cause similar symptoms Prior to initiating treatment with Cialis for BPH, consideration should be given to other urological conditions that may cause similar symptoms Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should not use Viagra if sexual activity is inadvisable due to cardiovascular status Patients should seek emergency treatment if an erection lasts >4 hours Patients should seek emergency treatment if an erection lasts >4 hours Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek medical care if a sudden loss of vision occurs in one or both eyes, which could be a sign of non arteritic anterior ischemic optic neuropathy (NAION) Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Patients should stop Viagra and seek prompt medical attention in the event of sudden decrease or loss of hearing Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Caution is advised when Viagra is co-administered with alpha-blockers or anti-hypertensives Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures Decreased blood pressure, fainting, and prolonged erection may occur at higher sildenafil exposures *This information is from the label for brand name Cialis®.